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Handheld Ultrasound Imaging Device Power Supply Reference Design
TIDUFA5
December 2024
CONTENTS
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Handheld Ultrasound Imaging Device Power Supply Reference Design
1
Description
Resources
Features
Applications
6
1
System Description
1.1
Key System Specifications
2
System Overview
2.1
Block Diagram
2.2
Design Considerations
2.2.1
Small Compact Size
2.2.2
Transformerless Design
2.3
Highlighted Products
2.3.1
BQ25790 IIC Controlled, 1–4 Cell, 5A Buck-Boost Battery Charger
2.3.2
TPS3422 Low-Power, Push-Button Controllers With Configurable Delay
2.3.3
SN74LVC1G74 Single Positive-Edge-Triggered D-Type Flip-Flop With Clear and Preset
2.3.4
TPS259470 2.7V–23V, 5.5A, 28mΩ True Reverse Current Blocking eFuse
2.3.5
TPS54218 2.95V to 6V Input, 2A Synchronous Step-Down SWIFT Converter
2.3.6
TPS54318 2.95V to 6V Input, 3A Synchronous Step-Down SWIFT Converter
2.3.7
LM5158 2.2MHz, Wide VIN, 85V Output Boost, SEPIC, or Flyback Converter
2.3.8
TPS61178 20V Fully Integrated Sync Boost With Load Disconnect
2.3.9
LMZM23601 36V, 1A Step-Down DC-DC Power Module in 3.8mm × 3mm Package
2.3.10
TPS7A39 Dual, 150mA, Wide-VIN, Positive and Negative Low-Dropout (LDO) Voltage Regulator
2.3.11
TPS74401 3.0A, Ultra-LDO With Programmable Soft Start
2.3.12
TPS7A96 2A, Ultra-Low Noise, Ultra-high PSRR RF Voltage Regulator
2.3.13
LM3880 3-Rail Simple Power Sequencer With Fixed Time Delay
2.3.14
DAC53401 10-Bit, Voltage-Output DAC With Nonvolatile Memory
2.3.15
INA231 28V, 16-bit, I2C Output Current, Voltage, and Power Monitor With Alert in WCSP
3
System Design Theory
3.1
Input Section
3.1.1
Buck-Boost Charger
3.1.2
Power On or Off
3.2
Designing SEPIC and Cuk Based High-Voltage Power Supply
3.2.1
Basic Operation Principle of SEPIC and Cuk Converters
3.2.2
Dual High-Voltage Power Supply Design Using Uncoupled Inductors With SEPIC and Cuk
3.2.2.1
Duty Cycle
3.2.2.2
Inductor Selection
3.2.2.3
Power MOSFET Verification
3.2.2.4
Output Diode Selection
3.2.2.5
Coupling Capacitor Selection
3.2.2.6
Output Capacitor Selection
3.2.2.7
Input Capacitor Selection
3.2.2.8
Programming the Output Voltage With Adjustable function
3.3
Designing the Low-Voltage Power Supply
3.3.1
Designing the TPS54218 Through WEBENCH Power Designer
3.3.2
±5V Transmit Supply Generation
3.4
System Clock Synchronization
3.5
Power and Data Output Connector
3.6
System Current and Power Monitoring
4
Hardware, Testing Requirements, and Test Results
4.1
Hardware Requirements
4.2
Test Setup
4.3
Test Results
4.3.1
Efficiency Test Result
4.3.2
Line Regulation Testing Result
4.3.3
Spectrum Test Result
5
Design and Documentation Support
5.1
Design Files
5.1.1
Schematics
5.1.2
BOM
5.1.3
PCB Layout Recommendations
5.1.3.1
High-Voltage Supply Layout
5.2
Tools and Software
5.3
Documentation Support
5.4
Support Resources
5.5
Trademarks
IMPORTANT NOTICE
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Design Guide
Handheld Ultrasound Imaging Device Power Supply Reference Design
